EU wants Europe to be supercomputing superpower How to replace failed disk on N-Series Filer Using Kernel Samepage Merging with KVM ld cannot find -lmkl_intel_ilp64.a How to fix a broken yum They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. not sure why they show up as autonegotiate here being on. ~ # ethtool --show-pause vmnic3Pause parameters for vmnic3:Autonegotiate: onRX: onTX: off~ # ethtool --show-pause vmnic4Pause parameters for vmnic4:Autonegotiate: onRX: onTX: Comment 2 Mark Wagner 2009-03-06 12:39:37 EST A before and after [root@perf10 ~]# ethtool -k peth3 Offload parameters for peth3: Cannot get device rx csum settings: No such device Cannot get
What I had working before was a pktgen.c patch and a driver patch for ixgbe to try to enable udp segementation using tso methods. Our storage provider would like to see these settings in place.Large Receive OffloadReceive Side ScalingTCP Checksum Offload(IPv4)Large Send Offload (IPv4)Offload TCP SegmentationI assume these are the availible settings of our current However if you have an application that can handle sending large chunks of data (don't need UFO) with the tso flag set in the skb, then the driver should be able For more information on therefore solution and/or where to find the updated files, please follow the link below. https://sourceforge.net/p/e1000/feature-requests/11/
Comment 22 Herbert Xu 2010-06-23 19:02:51 EDT PV passthrough doesn't need the fix but I think it should still work, albeit with the same effect as if you'd applied the fix The average throughput was less than half of what I was able to get with tx off as well. but I don't see that labeled as such.
Join our community today! Discussion Jesse Brandeburg - 2009-04-06 Hi, thanks for the report, this is not a bug, UDP fragmentation offload is not supported in any of the intel wired ethernet hardware. All Rights Reserved Privacy & Terms Review your favorite Linux distribution. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant.
PDXPaulee Oct 31, 2012 1:33 PM Can someone tell me the proper settings for iSCSI NICs to disable the following? I have scientific linux 6 running. Were there any specific driver patches supplied for those NICs (check the hotfix list for XS 6.2)? -=Tobias 1361-363438-1867452 Best Answer Back to top HEIKO BÖRINGER Members #3 HEIKO BÖRINGER 47 http://www.linuxquestions.org/questions/linux-networking-3/udp-vs-tcp-and-tcp-offload-issues-894045/ Comment 27 Paolo Bonzini 2010-08-04 13:41:56 EDT Herbert mentioned it is not a problem in comment #13.
Afaik, there's great savings involved, especially when it comes to CPU utilization, PCI bus utilization, etc. Do you think it is possible that the kernel cannot use the udp offload but the tcp offload works? For example: # ethtool --offload eth3 tso on # ethtool -k eth3 Offload parameters for eth3: Cannot get device udp large send offload settings: Operation not supported rx-checksumming: on tx-checksumming: on Reading the history in the CentOS Bugzilla and the upstream's Bugzilla, they recommend doing this within the udev rules.
Aakash Jacob Nov 12, 2012 1:02 PM (in response to PDXPaulee) HI PaulTCP offload is a feature that can be disabled at the driver level or at the hardware itself.At the https://communities.vmware.com/thread/423831?start=0&tstart=0 You are currently viewing LQ as a guest. We did not correlate it with tx hw assist, but we've root caused it. Do you have a BZ for your work?
Main Menu LQ Calendar LQ Rules LQ Sitemap Site FAQ View New Posts View Latest Posts Zero Reply Threads LQ Wiki Most Wanted Jeremy's Blog Report LQ Bug Syndicate Latest If you'd like to contribute content, let us know. We however ship our driver in > both Citrix'Xen server and VMware's ESX. Calling ethtool -K eth2 rx off tx off sg off tso off ufo off gso off gro off lro off produces the same error.
lugoteehalt Debian 3 05-04-2004 08:12 AM All times are GMT -5. More pressure on the pci bus, on the FW. JonasKunze View Public Profile View LQ Blog View Review Entries View HCL Entries Find More Posts by JonasKunze 07-27-2011, 10:50 PM #2 jefro Moderator Registered: Mar 2008 Posts: 15,261
for reference, UFO is for other vendor's hardware that can generate a packet stream like: input to driver skb > MTU size with UDP header output from hardware UDP packet with Several functions may not work. regards, Heiko 1361-363438-1867993 Back to top Report abuse Back to Networking Reply to quoted posts Clear Citrix ©1999-2016 Citrix Systems, Inc. If you would like to refer to this comment somewhere else in this project, copy and paste the following link: Jesse Brandeburg - 2009-04-07 not really a bug, but a feature
We have hit such a performance > degradation. best regards, Heiko 1361-363438-1867397 Back to top Tobias Kreidl CTP Member #2 Tobias Kreidl 17,356 posts Posted 01 April 2015 - 02:29 PM Hallo, Heiko: Are all firmware updates in place? What made me pensive was that using udp the CPU load was at 100% but using TCP the load was at about 20% independent on the mtu! Blogs Recent Entries Best Entries Best Blogs Blog List Search Blogs Home Forums HCL Reviews Tutorials Articles Register Search Search Forums Advanced Search Search Tags Search LQ Wiki Search Tutorials/Articles Search
If you would like to refer to this comment somewhere else in this project, copy and paste the following link: Jesse Brandeburg - 2009-04-06 UFO and the way our hardware implements PDXPaulee Nov 1, 2012 4:20 PM (in response to Aakash Jacob) Even though it say it's on this is what i get when i try to disable tso:[[email protected] ~]# ethtool -k skbs are freed on credit return > receptions. > It does not work for the VMs, skb_orphan() won't free up virtualized app'send > buffer. > > The attached patch provides a You may reopen this bug report if the solution does not work for you.
Aakash ,VCA -DCV/WM/Cloud,VCP-DCV 4/5,VCAP-DCA 4 | vExpert 2014 Mark my post as "helpful" or "correct" if I've helped resolve or answered your query! Observer results 3. Build a RHEL5.3 Xen guest on a system with the Chelsio card and create a bridge to 10GbE network. 2. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration.
It points to the opinion you mention :) In all the virtualized environments we have tested, the VM's app's send buffer frees up its load only when the hypervisor's driver frees LinuxQuestions.org > Forums > Linux Forums > Linux - Networking UDP vs TCP and tcp offload issues User Name Remember Me? I think you are using the command wrong to disable but post the exact command. Sign up for the SourceForge newsletter: I agree to receive quotes, newsletters and other information from sourceforge.net and its partners regarding IT services and products.
tcp and udp traffic could be handled in so many different ways by various parts of the system.